./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3747e65f01c1fbd6eb9d2ad39b0ceed8be631bde45acb074c0903963e660faab .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:45:43,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:45:43,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:45:43,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:45:43,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:45:43,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:45:43,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:45:43,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:45:43,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:45:43,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:45:43,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:45:43,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:45:43,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:45:43,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:45:43,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:45:43,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:45:43,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:45:43,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:45:43,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:45:43,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:45:43,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:45:43,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:45:43,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:45:43,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:45:43,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:45:43,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:45:43,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:45:43,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:45:43,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:45:43,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:45:43,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:45:43,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:45:43,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:45:43,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:45:43,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:45:43,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:45:43,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:45:43,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:45:43,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:45:43,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:45:43,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:45:43,578 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 23:45:43,600 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:45:43,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:45:43,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:45:43,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:45:43,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:45:43,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:45:43,602 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:45:43,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:45:43,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:45:43,603 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:45:43,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:45:43,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:45:43,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:45:43,604 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:45:43,604 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:45:43,604 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:45:43,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:45:43,605 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:45:43,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:45:43,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:45:43,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:45:43,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:45:43,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:45:43,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:45:43,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:45:43,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:45:43,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:45:43,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:45:43,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:45:43,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3747e65f01c1fbd6eb9d2ad39b0ceed8be631bde45acb074c0903963e660faab [2021-10-28 23:45:43,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:45:43,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:45:43,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:45:43,941 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:45:43,943 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:45:43,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i [2021-10-28 23:45:44,020 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/data/34d1d8c2d/c25ee8e3bfd044cd8f461115e959eef0/FLAGf37e71c37 [2021-10-28 23:45:44,560 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:45:44,560 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/sv-benchmarks/c/list-ext-properties/list-ext_flag.i [2021-10-28 23:45:44,578 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/data/34d1d8c2d/c25ee8e3bfd044cd8f461115e959eef0/FLAGf37e71c37 [2021-10-28 23:45:44,856 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/data/34d1d8c2d/c25ee8e3bfd044cd8f461115e959eef0 [2021-10-28 23:45:44,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:45:44,859 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:45:44,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:45:44,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:45:44,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:45:44,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:45:44" (1/1) ... [2021-10-28 23:45:44,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67ad5216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:44, skipping insertion in model container [2021-10-28 23:45:44,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:45:44" (1/1) ... [2021-10-28 23:45:44,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:45:44,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:45:45,285 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/sv-benchmarks/c/list-ext-properties/list-ext_flag.i[23527,23540] [2021-10-28 23:45:45,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:45:45,305 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:45:45,371 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/sv-benchmarks/c/list-ext-properties/list-ext_flag.i[23527,23540] [2021-10-28 23:45:45,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:45:45,410 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:45:45,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:45 WrapperNode [2021-10-28 23:45:45,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:45:45,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:45:45,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:45:45,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:45:45,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:45" (1/1) ... [2021-10-28 23:45:45,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:45" (1/1) ... [2021-10-28 23:45:45,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:45" (1/1) ... [2021-10-28 23:45:45,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:45" (1/1) ... [2021-10-28 23:45:45,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:45" (1/1) ... [2021-10-28 23:45:45,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:45" (1/1) ... [2021-10-28 23:45:45,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:45" (1/1) ... [2021-10-28 23:45:45,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:45:45,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:45:45,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:45:45,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:45:45,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:45" (1/1) ... [2021-10-28 23:45:45,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:45:45,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:45:45,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:45:45,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:45:45,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:45:45,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:45:45,559 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 23:45:45,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 23:45:45,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 23:45:45,561 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 23:45:45,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:45:45,561 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:45:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 23:45:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 23:45:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 23:45:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 23:45:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:45:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 23:45:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 23:45:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 23:45:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:45:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:45:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:45:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:45:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:45:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:45:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:45:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:45:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:45:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:45:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:45:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:45:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:45:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:45:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:45:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:45:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:45:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:45:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:45:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:45:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:45:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:45:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:45:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:45:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:45:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:45:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:45:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:45:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:45:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:45:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:45:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:45:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:45:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:45:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:45:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:45:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:45:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:45:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:45:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:45:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:45:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:45:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:45:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:45:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:45:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:45:45,571 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:45:45,571 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:45:45,571 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:45:45,571 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:45:45,572 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:45:45,572 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:45:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:45:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:45:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 23:45:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:45:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:45:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:45:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:45:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:45:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:45:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:45:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:45:45,575 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:45:45,575 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:45:45,575 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:45:45,576 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:45:45,576 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:45:45,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:45:45,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:45:45,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:45:45,576 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:45:45,576 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:45:45,576 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:45:45,576 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:45:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:45:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:45:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:45:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:45:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:45:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:45:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:45:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:45:45,578 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:45:45,578 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:45:45,578 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:45:45,578 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:45:45,578 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:45:45,578 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:45:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:45:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:45:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:45:45,579 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:45:45,580 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:45:45,580 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:45:45,580 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:45:45,580 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:45:45,580 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:45:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:45:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 23:45:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:45:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:45:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 23:45:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:45:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:45:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 23:45:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:45:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:45:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:45:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:45:45,904 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 23:45:46,158 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:45:46,164 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-28 23:45:46,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:45:46 BoogieIcfgContainer [2021-10-28 23:45:46,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:45:46,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:45:46,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:45:46,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:45:46,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:45:44" (1/3) ... [2021-10-28 23:45:46,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644a0e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:45:46, skipping insertion in model container [2021-10-28 23:45:46,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:45" (2/3) ... [2021-10-28 23:45:46,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644a0e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:45:46, skipping insertion in model container [2021-10-28 23:45:46,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:45:46" (3/3) ... [2021-10-28 23:45:46,188 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext_flag.i [2021-10-28 23:45:46,201 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:45:46,201 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-10-28 23:45:46,244 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:45:46,250 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:45:46,251 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-10-28 23:45:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 103 states have internal predecessors, (117), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:45:46,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 23:45:46,274 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:46,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:46,275 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:46,280 INFO L85 PathProgramCache]: Analyzing trace with hash -847606299, now seen corresponding path program 1 times [2021-10-28 23:45:46,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:46,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767301604] [2021-10-28 23:45:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:46,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:46,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:46,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:46,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767301604] [2021-10-28 23:45:46,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767301604] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:46,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:46,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:45:46,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728220589] [2021-10-28 23:45:46,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:45:46,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:46,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:45:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:45:46,553 INFO L87 Difference]: Start difference. First operand has 109 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 103 states have internal predecessors, (117), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:46,855 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2021-10-28 23:45:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:45:46,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-28 23:45:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:46,868 INFO L225 Difference]: With dead ends: 128 [2021-10-28 23:45:46,868 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 23:45:46,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:45:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 23:45:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2021-10-28 23:45:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2021-10-28 23:45:46,915 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 8 [2021-10-28 23:45:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:46,915 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2021-10-28 23:45:46,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2021-10-28 23:45:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 23:45:46,916 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:46,916 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:46,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:45:46,917 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:46,918 INFO L85 PathProgramCache]: Analyzing trace with hash -847606298, now seen corresponding path program 1 times [2021-10-28 23:45:46,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:46,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924233009] [2021-10-28 23:45:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:46,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:47,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:47,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:47,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924233009] [2021-10-28 23:45:47,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924233009] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:47,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:47,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:45:47,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728377278] [2021-10-28 23:45:47,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:45:47,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:47,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:45:47,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:45:47,079 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:47,292 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-10-28 23:45:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:45:47,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-28 23:45:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:47,294 INFO L225 Difference]: With dead ends: 99 [2021-10-28 23:45:47,295 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 23:45:47,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:45:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 23:45:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-10-28 23:45:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2021-10-28 23:45:47,326 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 8 [2021-10-28 23:45:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:47,326 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2021-10-28 23:45:47,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2021-10-28 23:45:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:45:47,327 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:47,328 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:47,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:45:47,328 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:47,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1330507837, now seen corresponding path program 1 times [2021-10-28 23:45:47,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:47,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262267568] [2021-10-28 23:45:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:47,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:47,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:47,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:47,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262267568] [2021-10-28 23:45:47,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262267568] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:47,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:47,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:45:47,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006104668] [2021-10-28 23:45:47,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:45:47,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:45:47,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:45:47,406 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:47,635 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2021-10-28 23:45:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:45:47,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 23:45:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:47,643 INFO L225 Difference]: With dead ends: 109 [2021-10-28 23:45:47,644 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 23:45:47,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:45:47,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 23:45:47,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2021-10-28 23:45:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.7) internal successors, (102), 87 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2021-10-28 23:45:47,668 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 13 [2021-10-28 23:45:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:47,668 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2021-10-28 23:45:47,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2021-10-28 23:45:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:45:47,669 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:47,669 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:47,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:45:47,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:47,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:47,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1330507836, now seen corresponding path program 1 times [2021-10-28 23:45:47,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:47,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350666991] [2021-10-28 23:45:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:47,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:47,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:47,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:47,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350666991] [2021-10-28 23:45:47,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350666991] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:47,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:47,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:45:47,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750214933] [2021-10-28 23:45:47,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:45:47,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:47,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:45:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:45:47,762 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:47,999 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2021-10-28 23:45:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:45:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 23:45:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:48,001 INFO L225 Difference]: With dead ends: 127 [2021-10-28 23:45:48,001 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 23:45:48,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:45:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 23:45:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2021-10-28 23:45:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 83 states have (on average 1.5060240963855422) internal successors, (125), 108 states have internal predecessors, (125), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2021-10-28 23:45:48,010 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 13 [2021-10-28 23:45:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:48,011 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2021-10-28 23:45:48,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2021-10-28 23:45:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:45:48,012 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:48,012 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:48,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:45:48,013 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:48,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:48,013 INFO L85 PathProgramCache]: Analyzing trace with hash 193832546, now seen corresponding path program 1 times [2021-10-28 23:45:48,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:48,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214458774] [2021-10-28 23:45:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:48,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:48,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:48,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:48,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214458774] [2021-10-28 23:45:48,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214458774] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:48,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:48,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:45:48,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956949443] [2021-10-28 23:45:48,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:45:48,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:45:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:45:48,160 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:48,327 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2021-10-28 23:45:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:45:48,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 23:45:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:48,330 INFO L225 Difference]: With dead ends: 160 [2021-10-28 23:45:48,330 INFO L226 Difference]: Without dead ends: 160 [2021-10-28 23:45:48,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:45:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-28 23:45:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 117. [2021-10-28 23:45:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 88 states have (on average 1.4886363636363635) internal successors, (131), 113 states have internal predecessors, (131), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2021-10-28 23:45:48,340 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 19 [2021-10-28 23:45:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:48,341 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2021-10-28 23:45:48,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2021-10-28 23:45:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:45:48,342 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:48,342 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:48,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:45:48,343 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:48,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1616463057, now seen corresponding path program 1 times [2021-10-28 23:45:48,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:48,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991139748] [2021-10-28 23:45:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:48,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:48,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:48,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:48,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991139748] [2021-10-28 23:45:48,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991139748] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:48,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:48,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:45:48,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341980603] [2021-10-28 23:45:48,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:45:48,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:48,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:45:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:45:48,476 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:48,751 INFO L93 Difference]: Finished difference Result 173 states and 189 transitions. [2021-10-28 23:45:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:45:48,752 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 23:45:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:48,753 INFO L225 Difference]: With dead ends: 173 [2021-10-28 23:45:48,753 INFO L226 Difference]: Without dead ends: 173 [2021-10-28 23:45:48,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-28 23:45:48,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 117. [2021-10-28 23:45:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 88 states have (on average 1.4772727272727273) internal successors, (130), 113 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2021-10-28 23:45:48,762 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 21 [2021-10-28 23:45:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:48,763 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2021-10-28 23:45:48,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2021-10-28 23:45:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:45:48,764 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:48,764 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:48,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:45:48,765 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr31ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:48,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1497879082, now seen corresponding path program 1 times [2021-10-28 23:45:48,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:48,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716178347] [2021-10-28 23:45:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:48,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:48,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:48,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:48,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716178347] [2021-10-28 23:45:48,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716178347] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:48,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:48,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:45:48,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058102616] [2021-10-28 23:45:48,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:45:48,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:48,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:45:48,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:45:48,857 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:49,026 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2021-10-28 23:45:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:45:49,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-28 23:45:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:49,032 INFO L225 Difference]: With dead ends: 126 [2021-10-28 23:45:49,032 INFO L226 Difference]: Without dead ends: 126 [2021-10-28 23:45:49,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:45:49,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-28 23:45:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2021-10-28 23:45:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 90 states have (on average 1.4555555555555555) internal successors, (131), 114 states have internal predecessors, (131), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2021-10-28 23:45:49,044 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 23 [2021-10-28 23:45:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:49,044 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2021-10-28 23:45:49,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2021-10-28 23:45:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:45:49,046 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:49,046 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:49,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:45:49,047 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:49,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1394657415, now seen corresponding path program 1 times [2021-10-28 23:45:49,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:49,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913923462] [2021-10-28 23:45:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:49,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:49,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:49,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:49,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913923462] [2021-10-28 23:45:49,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913923462] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:49,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:49,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:45:49,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359431702] [2021-10-28 23:45:49,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:45:49,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:49,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:45:49,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:45:49,170 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:49,339 INFO L93 Difference]: Finished difference Result 155 states and 172 transitions. [2021-10-28 23:45:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:45:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 23:45:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:49,341 INFO L225 Difference]: With dead ends: 155 [2021-10-28 23:45:49,341 INFO L226 Difference]: Without dead ends: 145 [2021-10-28 23:45:49,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-28 23:45:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2021-10-28 23:45:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 95 states have (on average 1.431578947368421) internal successors, (136), 119 states have internal predecessors, (136), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2021-10-28 23:45:49,358 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 26 [2021-10-28 23:45:49,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:49,359 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2021-10-28 23:45:49,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2021-10-28 23:45:49,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:45:49,362 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:49,362 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:49,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 23:45:49,363 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash -113018189, now seen corresponding path program 1 times [2021-10-28 23:45:49,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:49,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35304336] [2021-10-28 23:45:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:49,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:49,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:49,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:49,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35304336] [2021-10-28 23:45:49,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35304336] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:49,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:49,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:45:49,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391137583] [2021-10-28 23:45:49,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:45:49,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:45:49,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:45:49,440 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:49,718 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2021-10-28 23:45:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:45:49,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 23:45:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:49,720 INFO L225 Difference]: With dead ends: 124 [2021-10-28 23:45:49,720 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 23:45:49,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 23:45:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2021-10-28 23:45:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.4105263157894736) internal successors, (134), 117 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2021-10-28 23:45:49,725 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 26 [2021-10-28 23:45:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:49,725 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2021-10-28 23:45:49,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2021-10-28 23:45:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:45:49,726 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:49,727 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:49,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 23:45:49,727 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:49,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:49,727 INFO L85 PathProgramCache]: Analyzing trace with hash -113018188, now seen corresponding path program 1 times [2021-10-28 23:45:49,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:49,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354731437] [2021-10-28 23:45:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:49,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:49,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:49,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:49,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354731437] [2021-10-28 23:45:49,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354731437] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:49,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:49,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:45:49,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111919614] [2021-10-28 23:45:49,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:45:49,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:45:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:45:49,830 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:50,142 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-10-28 23:45:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:45:50,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 23:45:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:50,143 INFO L225 Difference]: With dead ends: 121 [2021-10-28 23:45:50,143 INFO L226 Difference]: Without dead ends: 121 [2021-10-28 23:45:50,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:45:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-28 23:45:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2021-10-28 23:45:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 85 states have (on average 1.3647058823529412) internal successors, (116), 100 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2021-10-28 23:45:50,146 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 26 [2021-10-28 23:45:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:50,147 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2021-10-28 23:45:50,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2021-10-28 23:45:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 23:45:50,148 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:50,148 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:50,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:45:50,149 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:50,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:50,149 INFO L85 PathProgramCache]: Analyzing trace with hash 870242649, now seen corresponding path program 1 times [2021-10-28 23:45:50,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:50,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693510389] [2021-10-28 23:45:50,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:50,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:50,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:50,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:50,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693510389] [2021-10-28 23:45:50,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693510389] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:50,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:50,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 23:45:50,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915509055] [2021-10-28 23:45:50,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:45:50,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:50,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:45:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:45:50,323 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:50,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:50,573 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2021-10-28 23:45:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:45:50,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-10-28 23:45:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:50,574 INFO L225 Difference]: With dead ends: 113 [2021-10-28 23:45:50,574 INFO L226 Difference]: Without dead ends: 102 [2021-10-28 23:45:50,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-28 23:45:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2021-10-28 23:45:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 89 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2021-10-28 23:45:50,578 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 29 [2021-10-28 23:45:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:50,578 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2021-10-28 23:45:50,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2021-10-28 23:45:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 23:45:50,579 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:50,580 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:50,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 23:45:50,580 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:50,580 INFO L85 PathProgramCache]: Analyzing trace with hash -809558702, now seen corresponding path program 1 times [2021-10-28 23:45:50,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:50,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111853359] [2021-10-28 23:45:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:50,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:50,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:45:50,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:50,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111853359] [2021-10-28 23:45:50,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111853359] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:50,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:50,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 23:45:50,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299563171] [2021-10-28 23:45:50,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:45:50,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:50,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:45:50,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:45:50,714 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:50,888 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2021-10-28 23:45:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:45:50,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-10-28 23:45:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:50,890 INFO L225 Difference]: With dead ends: 144 [2021-10-28 23:45:50,890 INFO L226 Difference]: Without dead ends: 144 [2021-10-28 23:45:50,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-28 23:45:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 100. [2021-10-28 23:45:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.3950617283950617) internal successors, (113), 96 states have internal predecessors, (113), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2021-10-28 23:45:50,894 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 32 [2021-10-28 23:45:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:50,894 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2021-10-28 23:45:50,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2021-10-28 23:45:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 23:45:50,895 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:50,896 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:50,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 23:45:50,896 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash -129500332, now seen corresponding path program 1 times [2021-10-28 23:45:50,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:50,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815294795] [2021-10-28 23:45:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:50,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:50,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:50,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:50,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815294795] [2021-10-28 23:45:50,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815294795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:45:50,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548884161] [2021-10-28 23:45:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:50,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:45:50,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:45:50,980 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:45:50,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:45:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:45:51,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:45:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:51,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548884161] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:45:51,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:45:51,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-28 23:45:51,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673693567] [2021-10-28 23:45:51,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:45:51,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:51,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:45:51,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:45:51,293 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:51,475 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2021-10-28 23:45:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:45:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-10-28 23:45:51,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:51,477 INFO L225 Difference]: With dead ends: 164 [2021-10-28 23:45:51,477 INFO L226 Difference]: Without dead ends: 164 [2021-10-28 23:45:51,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-28 23:45:51,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 113. [2021-10-28 23:45:51,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 94 states have (on average 1.3404255319148937) internal successors, (126), 109 states have internal predecessors, (126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-10-28 23:45:51,481 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 32 [2021-10-28 23:45:51,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:51,482 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-10-28 23:45:51,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-10-28 23:45:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:45:51,483 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:51,483 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:51,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:45:51,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:45:51,684 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:51,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:51,685 INFO L85 PathProgramCache]: Analyzing trace with hash -569851967, now seen corresponding path program 1 times [2021-10-28 23:45:51,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:51,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397694175] [2021-10-28 23:45:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:51,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:52,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:52,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:52,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397694175] [2021-10-28 23:45:52,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397694175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:45:52,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994184626] [2021-10-28 23:45:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:52,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:45:52,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:45:52,031 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:45:52,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:45:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:52,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 23:45:52,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:45:52,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 23:45:52,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:45:52,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-10-28 23:45:52,516 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:45:52,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:45:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:45:52,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:45:52,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:45:52,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-10-28 23:45:52,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 23:45:52,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-10-28 23:45:52,994 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-10-28 23:45:52,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-10-28 23:45:53,279 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-10-28 23:45:53,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 30 [2021-10-28 23:45:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:53,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994184626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:45:53,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:45:53,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-10-28 23:45:53,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885261966] [2021-10-28 23:45:53,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 23:45:53,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:53,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 23:45:53,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:45:53,320 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:54,605 INFO L93 Difference]: Finished difference Result 306 states and 340 transitions. [2021-10-28 23:45:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:45:54,606 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-10-28 23:45:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:54,608 INFO L225 Difference]: With dead ends: 306 [2021-10-28 23:45:54,608 INFO L226 Difference]: Without dead ends: 306 [2021-10-28 23:45:54,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:45:54,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-10-28 23:45:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 146. [2021-10-28 23:45:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 127 states have (on average 1.3070866141732282) internal successors, (166), 142 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 169 transitions. [2021-10-28 23:45:54,615 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 169 transitions. Word has length 34 [2021-10-28 23:45:54,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:54,616 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 169 transitions. [2021-10-28 23:45:54,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 169 transitions. [2021-10-28 23:45:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:45:54,617 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:54,617 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:54,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:45:54,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 23:45:54,838 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:54,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:54,838 INFO L85 PathProgramCache]: Analyzing trace with hash -570159797, now seen corresponding path program 1 times [2021-10-28 23:45:54,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:54,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498702590] [2021-10-28 23:45:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:54,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:54,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:55,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:55,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498702590] [2021-10-28 23:45:55,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498702590] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:45:55,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041348709] [2021-10-28 23:45:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:55,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:45:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:45:55,004 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:45:55,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:45:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:55,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 23:45:55,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:45:55,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:45:55,424 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:45:55,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:45:55,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 23:45:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:45:55,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 23:45:55,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-10-28 23:45:55,622 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 23:45:55,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-28 23:45:55,802 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 23:45:55,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-28 23:45:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:55,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041348709] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:45:55,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:45:55,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-28 23:45:55,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489910728] [2021-10-28 23:45:55,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:45:55,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:55,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:45:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:45:55,812 INFO L87 Difference]: Start difference. First operand 146 states and 169 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:56,557 INFO L93 Difference]: Finished difference Result 242 states and 270 transitions. [2021-10-28 23:45:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:45:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-10-28 23:45:56,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:56,559 INFO L225 Difference]: With dead ends: 242 [2021-10-28 23:45:56,560 INFO L226 Difference]: Without dead ends: 242 [2021-10-28 23:45:56,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:45:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-28 23:45:56,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 154. [2021-10-28 23:45:56,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 135 states have (on average 1.2962962962962963) internal successors, (175), 150 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 178 transitions. [2021-10-28 23:45:56,566 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 178 transitions. Word has length 34 [2021-10-28 23:45:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:56,566 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 178 transitions. [2021-10-28 23:45:56,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 178 transitions. [2021-10-28 23:45:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:45:56,568 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:56,568 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:56,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:45:56,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:45:56,786 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:56,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:56,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1187638495, now seen corresponding path program 1 times [2021-10-28 23:45:56,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:56,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629504045] [2021-10-28 23:45:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:56,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:56,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:56,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:56,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629504045] [2021-10-28 23:45:56,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629504045] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:45:56,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216396895] [2021-10-28 23:45:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:56,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:45:56,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:45:56,995 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:45:57,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:45:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:57,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 23:45:57,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:45:57,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:45:57,458 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:45:57,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:45:57,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:45:57,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 23:45:57,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 23:45:57,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-10-28 23:45:57,691 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 23:45:57,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-28 23:45:57,864 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 23:45:57,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-28 23:45:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:57,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216396895] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:45:57,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:45:57,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-28 23:45:57,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850671673] [2021-10-28 23:45:57,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:45:57,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:45:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:45:57,873 INFO L87 Difference]: Start difference. First operand 154 states and 178 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:45:58,871 INFO L93 Difference]: Finished difference Result 277 states and 312 transitions. [2021-10-28 23:45:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:45:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-10-28 23:45:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:45:58,874 INFO L225 Difference]: With dead ends: 277 [2021-10-28 23:45:58,874 INFO L226 Difference]: Without dead ends: 277 [2021-10-28 23:45:58,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:45:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-10-28 23:45:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 163. [2021-10-28 23:45:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 144 states have (on average 1.2986111111111112) internal successors, (187), 159 states have internal predecessors, (187), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 190 transitions. [2021-10-28 23:45:58,880 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 190 transitions. Word has length 34 [2021-10-28 23:45:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:45:58,881 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 190 transitions. [2021-10-28 23:45:58,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:45:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 190 transitions. [2021-10-28 23:45:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:45:58,882 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:45:58,882 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:58,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:45:59,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:45:59,110 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:45:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:59,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1187946325, now seen corresponding path program 1 times [2021-10-28 23:45:59,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:59,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122341933] [2021-10-28 23:45:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:59,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:59,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:45:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:59,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:59,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122341933] [2021-10-28 23:45:59,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122341933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:45:59,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074300625] [2021-10-28 23:45:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:59,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:45:59,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:45:59,422 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:45:59,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:45:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:59,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 23:45:59,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:45:59,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 23:45:59,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:45:59,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 23:45:59,993 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:45:59,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:46:00,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:00,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:00,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:00,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-28 23:46:00,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 23:46:00,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-10-28 23:46:00,407 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-10-28 23:46:00,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-10-28 23:46:00,660 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-10-28 23:46:00,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 29 [2021-10-28 23:46:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:00,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074300625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:00,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:46:00,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-10-28 23:46:00,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889809865] [2021-10-28 23:46:00,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:46:00,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:00,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:46:00,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:46:00,674 INFO L87 Difference]: Start difference. First operand 163 states and 190 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:01,973 INFO L93 Difference]: Finished difference Result 258 states and 292 transitions. [2021-10-28 23:46:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:46:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-10-28 23:46:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:01,976 INFO L225 Difference]: With dead ends: 258 [2021-10-28 23:46:01,976 INFO L226 Difference]: Without dead ends: 258 [2021-10-28 23:46:01,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=919, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:46:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-10-28 23:46:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2021-10-28 23:46:01,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 144 states have (on average 1.2916666666666667) internal successors, (186), 159 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:01,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2021-10-28 23:46:01,982 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 34 [2021-10-28 23:46:01,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:01,983 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2021-10-28 23:46:01,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:01,983 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2021-10-28 23:46:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 23:46:01,984 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:01,984 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:02,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:46:02,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:46:02,202 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:02,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:02,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1832247170, now seen corresponding path program 1 times [2021-10-28 23:46:02,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:02,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274433873] [2021-10-28 23:46:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:02,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:02,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:02,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:02,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274433873] [2021-10-28 23:46:02,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274433873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:02,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190993817] [2021-10-28 23:46:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:02,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:02,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:46:02,410 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:46:02,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:46:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:02,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:46:02,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:46:02,919 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 23:46:02,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 23:46:02,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:46:03,214 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 23:46:03,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-10-28 23:46:03,425 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-10-28 23:46:03,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 27 [2021-10-28 23:46:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:03,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190993817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:03,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:46:03,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-10-28 23:46:03,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889588622] [2021-10-28 23:46:03,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 23:46:03,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:03,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 23:46:03,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:46:03,490 INFO L87 Difference]: Start difference. First operand 163 states and 189 transitions. Second operand has 26 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:04,275 INFO L93 Difference]: Finished difference Result 266 states and 301 transitions. [2021-10-28 23:46:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:46:04,276 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-28 23:46:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:04,277 INFO L225 Difference]: With dead ends: 266 [2021-10-28 23:46:04,277 INFO L226 Difference]: Without dead ends: 266 [2021-10-28 23:46:04,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:46:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-28 23:46:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-10-28 23:46:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 147 states have (on average 1.2925170068027212) internal successors, (190), 162 states have internal predecessors, (190), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 193 transitions. [2021-10-28 23:46:04,283 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 193 transitions. Word has length 36 [2021-10-28 23:46:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:04,284 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 193 transitions. [2021-10-28 23:46:04,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 193 transitions. [2021-10-28 23:46:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 23:46:04,285 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:04,285 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:04,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:46:04,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:46:04,501 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:04,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1832247171, now seen corresponding path program 1 times [2021-10-28 23:46:04,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:04,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568035704] [2021-10-28 23:46:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:04,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:04,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:04,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:04,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568035704] [2021-10-28 23:46:04,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568035704] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:04,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100834969] [2021-10-28 23:46:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:04,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:04,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:46:04,771 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:46:04,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:46:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:05,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 23:46:05,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:46:05,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 23:46:05,345 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:46:05,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:46:05,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:46:05,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 23:46:05,591 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 23:46:05,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 53 [2021-10-28 23:46:05,604 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-28 23:46:05,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-10-28 23:46:05,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-10-28 23:46:05,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-10-28 23:46:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:05,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100834969] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:05,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:46:05,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-10-28 23:46:05,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558650799] [2021-10-28 23:46:05,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:46:05,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:05,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:46:05,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:46:05,792 INFO L87 Difference]: Start difference. First operand 166 states and 193 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:06,356 INFO L93 Difference]: Finished difference Result 272 states and 310 transitions. [2021-10-28 23:46:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:46:06,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-28 23:46:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:06,358 INFO L225 Difference]: With dead ends: 272 [2021-10-28 23:46:06,358 INFO L226 Difference]: Without dead ends: 272 [2021-10-28 23:46:06,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:46:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-28 23:46:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 165. [2021-10-28 23:46:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 146 states have (on average 1.2876712328767124) internal successors, (188), 161 states have internal predecessors, (188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2021-10-28 23:46:06,365 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 36 [2021-10-28 23:46:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:06,365 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2021-10-28 23:46:06,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2021-10-28 23:46:06,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 23:46:06,366 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:06,367 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:06,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:46:06,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:06,582 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:06,584 INFO L85 PathProgramCache]: Analyzing trace with hash -744971369, now seen corresponding path program 1 times [2021-10-28 23:46:06,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:06,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829137718] [2021-10-28 23:46:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:06,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:06,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:06,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:06,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829137718] [2021-10-28 23:46:06,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829137718] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:06,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703113624] [2021-10-28 23:46:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:06,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:06,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:46:06,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:46:06,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:46:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:07,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:46:07,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:46:07,391 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:46:07,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:46:07,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-28 23:46:07,651 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:46:07,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 38 [2021-10-28 23:46:07,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:46:07,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 30 [2021-10-28 23:46:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:07,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703113624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:07,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:46:07,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-10-28 23:46:07,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749988587] [2021-10-28 23:46:07,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:46:07,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:07,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:46:07,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:46:07,923 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:09,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:09,805 INFO L93 Difference]: Finished difference Result 367 states and 414 transitions. [2021-10-28 23:46:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 23:46:09,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-10-28 23:46:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:09,807 INFO L225 Difference]: With dead ends: 367 [2021-10-28 23:46:09,807 INFO L226 Difference]: Without dead ends: 365 [2021-10-28 23:46:09,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=604, Invalid=2818, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 23:46:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-10-28 23:46:09,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 192. [2021-10-28 23:46:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 173 states have (on average 1.329479768786127) internal successors, (230), 188 states have internal predecessors, (230), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 233 transitions. [2021-10-28 23:46:09,815 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 233 transitions. Word has length 39 [2021-10-28 23:46:09,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:09,815 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 233 transitions. [2021-10-28 23:46:09,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:09,816 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 233 transitions. [2021-10-28 23:46:09,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:46:09,816 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:09,816 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:09,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:46:10,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:10,042 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash 410314524, now seen corresponding path program 1 times [2021-10-28 23:46:10,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:10,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101392708] [2021-10-28 23:46:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:10,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:10,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:46:10,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:10,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101392708] [2021-10-28 23:46:10,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101392708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:10,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492253685] [2021-10-28 23:46:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:10,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:10,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:46:10,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:46:10,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:46:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:10,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:46:10,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:46:10,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 23:46:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:10,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492253685] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:10,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:46:10,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-28 23:46:10,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259599416] [2021-10-28 23:46:10,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:46:10,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:10,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:46:10,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:46:10,711 INFO L87 Difference]: Start difference. First operand 192 states and 233 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:11,022 INFO L93 Difference]: Finished difference Result 428 states and 517 transitions. [2021-10-28 23:46:11,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:46:11,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-10-28 23:46:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:11,026 INFO L225 Difference]: With dead ends: 428 [2021-10-28 23:46:11,026 INFO L226 Difference]: Without dead ends: 428 [2021-10-28 23:46:11,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:46:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-10-28 23:46:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 258. [2021-10-28 23:46:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 239 states have (on average 1.397489539748954) internal successors, (334), 254 states have internal predecessors, (334), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 337 transitions. [2021-10-28 23:46:11,035 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 337 transitions. Word has length 40 [2021-10-28 23:46:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:11,035 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 337 transitions. [2021-10-28 23:46:11,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:11,035 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 337 transitions. [2021-10-28 23:46:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 23:46:11,036 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:11,036 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:11,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:46:11,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:11,262 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:11,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:11,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1936269525, now seen corresponding path program 1 times [2021-10-28 23:46:11,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:11,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568373777] [2021-10-28 23:46:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:11,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:11,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 23:46:11,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:11,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568373777] [2021-10-28 23:46:11,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568373777] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:46:11,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:46:11,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:46:11,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194416544] [2021-10-28 23:46:11,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:46:11,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:46:11,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:46:11,342 INFO L87 Difference]: Start difference. First operand 258 states and 337 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:11,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:11,514 INFO L93 Difference]: Finished difference Result 257 states and 335 transitions. [2021-10-28 23:46:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:46:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-10-28 23:46:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:11,519 INFO L225 Difference]: With dead ends: 257 [2021-10-28 23:46:11,519 INFO L226 Difference]: Without dead ends: 257 [2021-10-28 23:46:11,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:46:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-10-28 23:46:11,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2021-10-28 23:46:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 237 states have (on average 1.3966244725738397) internal successors, (331), 252 states have internal predecessors, (331), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 334 transitions. [2021-10-28 23:46:11,539 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 334 transitions. Word has length 41 [2021-10-28 23:46:11,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:11,540 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 334 transitions. [2021-10-28 23:46:11,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 334 transitions. [2021-10-28 23:46:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 23:46:11,541 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:11,541 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:11,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 23:46:11,541 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:11,542 INFO L85 PathProgramCache]: Analyzing trace with hash -797753589, now seen corresponding path program 1 times [2021-10-28 23:46:11,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:11,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27352481] [2021-10-28 23:46:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:11,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:11,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:11,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:11,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27352481] [2021-10-28 23:46:11,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27352481] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:11,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972023008] [2021-10-28 23:46:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:11,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:11,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:46:11,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:46:11,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:46:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:12,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 23:46:12,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:46:12,388 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:46:12,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:46:12,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 23:46:12,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 23:46:12,541 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-28 23:46:12,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 84 [2021-10-28 23:46:12,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 75 [2021-10-28 23:46:12,561 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-28 23:46:12,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-10-28 23:46:12,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-10-28 23:46:12,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-28 23:46:12,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 23:46:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:12,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972023008] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:12,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:46:12,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-10-28 23:46:12,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849026740] [2021-10-28 23:46:12,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:46:12,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:46:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:46:12,715 INFO L87 Difference]: Start difference. First operand 256 states and 334 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:13,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:13,421 INFO L93 Difference]: Finished difference Result 262 states and 309 transitions. [2021-10-28 23:46:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:46:13,422 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-10-28 23:46:13,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:13,423 INFO L225 Difference]: With dead ends: 262 [2021-10-28 23:46:13,424 INFO L226 Difference]: Without dead ends: 262 [2021-10-28 23:46:13,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:46:13,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-28 23:46:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 223. [2021-10-28 23:46:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 204 states have (on average 1.3137254901960784) internal successors, (268), 219 states have internal predecessors, (268), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 271 transitions. [2021-10-28 23:46:13,431 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 271 transitions. Word has length 42 [2021-10-28 23:46:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:13,432 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 271 transitions. [2021-10-28 23:46:13,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 271 transitions. [2021-10-28 23:46:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 23:46:13,433 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:13,433 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:13,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:46:13,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 23:46:13,654 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:13,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:13,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1466980265, now seen corresponding path program 1 times [2021-10-28 23:46:13,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:13,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781113637] [2021-10-28 23:46:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:13,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:13,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:46:13,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:13,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781113637] [2021-10-28 23:46:13,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781113637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:13,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207574799] [2021-10-28 23:46:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:13,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:46:13,850 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:46:13,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:46:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:14,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:46:14,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:46:14,510 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 23:46:14,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 23:46:14,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:46:14,793 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:46:14,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 39 [2021-10-28 23:46:15,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:46:15,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2021-10-28 23:46:15,318 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-28 23:46:15,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-10-28 23:46:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:15,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207574799] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:15,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:46:15,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-10-28 23:46:15,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715220802] [2021-10-28 23:46:15,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:46:15,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:15,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:46:15,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:46:15,356 INFO L87 Difference]: Start difference. First operand 223 states and 271 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:17,724 INFO L93 Difference]: Finished difference Result 337 states and 385 transitions. [2021-10-28 23:46:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 23:46:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-10-28 23:46:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:17,726 INFO L225 Difference]: With dead ends: 337 [2021-10-28 23:46:17,726 INFO L226 Difference]: Without dead ends: 337 [2021-10-28 23:46:17,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=591, Invalid=3069, Unknown=0, NotChecked=0, Total=3660 [2021-10-28 23:46:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-10-28 23:46:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 231. [2021-10-28 23:46:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 212 states have (on average 1.3018867924528301) internal successors, (276), 227 states have internal predecessors, (276), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 279 transitions. [2021-10-28 23:46:17,734 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 279 transitions. Word has length 42 [2021-10-28 23:46:17,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:17,735 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 279 transitions. [2021-10-28 23:46:17,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:17,735 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 279 transitions. [2021-10-28 23:46:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 23:46:17,736 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:17,736 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:17,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:46:17,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:17,942 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:17,942 INFO L85 PathProgramCache]: Analyzing trace with hash -961030053, now seen corresponding path program 2 times [2021-10-28 23:46:17,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:17,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758063692] [2021-10-28 23:46:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:17,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:18,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:18,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:18,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758063692] [2021-10-28 23:46:18,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758063692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:18,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144642896] [2021-10-28 23:46:18,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:46:18,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:18,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:46:18,242 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:46:18,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:46:18,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:46:18,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:46:18,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 23:46:18,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:46:18,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:46:18,921 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:46:18,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:46:18,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:18,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 23:46:18,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 23:46:19,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-10-28 23:46:19,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 23:46:19,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-28 23:46:19,308 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:46:19,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:46:19,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 23:46:19,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:19,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-28 23:46:19,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-10-28 23:46:19,604 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-28 23:46:19,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2021-10-28 23:46:19,806 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 23:46:19,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-28 23:46:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:19,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144642896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:19,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:46:19,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-10-28 23:46:19,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148269635] [2021-10-28 23:46:19,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 23:46:19,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 23:46:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:46:19,814 INFO L87 Difference]: Start difference. First operand 231 states and 279 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:20,862 INFO L93 Difference]: Finished difference Result 438 states and 523 transitions. [2021-10-28 23:46:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 23:46:20,863 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-10-28 23:46:20,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:20,866 INFO L225 Difference]: With dead ends: 438 [2021-10-28 23:46:20,866 INFO L226 Difference]: Without dead ends: 438 [2021-10-28 23:46:20,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=398, Invalid=1954, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 23:46:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-10-28 23:46:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 277. [2021-10-28 23:46:20,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 258 states have (on average 1.2868217054263567) internal successors, (332), 273 states have internal predecessors, (332), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 335 transitions. [2021-10-28 23:46:20,876 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 335 transitions. Word has length 47 [2021-10-28 23:46:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:20,876 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 335 transitions. [2021-10-28 23:46:20,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:20,877 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 335 transitions. [2021-10-28 23:46:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 23:46:20,877 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:20,877 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:20,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:46:21,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:21,094 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash -667307151, now seen corresponding path program 1 times [2021-10-28 23:46:21,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:21,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543443387] [2021-10-28 23:46:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:21,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:21,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:21,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:21,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543443387] [2021-10-28 23:46:21,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543443387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:21,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035382359] [2021-10-28 23:46:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:21,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:21,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:46:21,384 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:46:21,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:46:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:21,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 23:46:21,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:46:22,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:46:22,216 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 23:46:22,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 23:46:22,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:22,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 23:46:22,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:46:22,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-10-28 23:46:22,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 23:46:22,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-28 23:46:22,592 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 23:46:22,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 23:46:22,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-28 23:46:22,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:22,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-28 23:46:22,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-10-28 23:46:22,934 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-28 23:46:22,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-10-28 23:46:23,356 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-28 23:46:23,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-10-28 23:46:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:23,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035382359] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:23,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:46:23,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-10-28 23:46:23,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699824101] [2021-10-28 23:46:23,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 23:46:23,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 23:46:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:46:23,367 INFO L87 Difference]: Start difference. First operand 277 states and 335 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:37,073 INFO L93 Difference]: Finished difference Result 583 states and 695 transitions. [2021-10-28 23:46:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-28 23:46:37,082 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-10-28 23:46:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:37,085 INFO L225 Difference]: With dead ends: 583 [2021-10-28 23:46:37,086 INFO L226 Difference]: Without dead ends: 583 [2021-10-28 23:46:37,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=684, Invalid=3348, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 23:46:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-10-28 23:46:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 281. [2021-10-28 23:46:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 262 states have (on average 1.2786259541984732) internal successors, (335), 277 states have internal predecessors, (335), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:37,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 338 transitions. [2021-10-28 23:46:37,096 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 338 transitions. Word has length 47 [2021-10-28 23:46:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:37,096 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 338 transitions. [2021-10-28 23:46:37,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 338 transitions. [2021-10-28 23:46:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 23:46:37,097 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:37,098 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:37,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:46:37,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 23:46:37,318 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:37,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:37,318 INFO L85 PathProgramCache]: Analyzing trace with hash -667614981, now seen corresponding path program 1 times [2021-10-28 23:46:37,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:37,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330143491] [2021-10-28 23:46:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:37,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:37,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:37,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:37,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330143491] [2021-10-28 23:46:37,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330143491] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:37,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298736435] [2021-10-28 23:46:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:37,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:37,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:46:37,743 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:46:37,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:46:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:38,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 23:46:38,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:46:38,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 23:46:38,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:38,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 23:46:38,601 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 23:46:38,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 23:46:38,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:46:38,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:38,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:38,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:38,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-28 23:46:38,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-10-28 23:46:38,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:38,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-28 23:46:39,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:39,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-10-28 23:46:39,161 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 23:46:39,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 23:46:39,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:39,266 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 23:46:39,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-28 23:46:39,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-28 23:46:39,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-10-28 23:46:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:46:39,613 INFO L354 Elim1Store]: treesize reduction 104, result has 18.8 percent of original size [2021-10-28 23:46:39,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 52 [2021-10-28 23:46:39,959 INFO L354 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2021-10-28 23:46:39,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 34 [2021-10-28 23:46:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:39,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298736435] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:39,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:46:39,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-10-28 23:46:39,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752342110] [2021-10-28 23:46:39,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 23:46:39,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:39,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 23:46:39,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:46:39,985 INFO L87 Difference]: Start difference. First operand 281 states and 338 transitions. Second operand has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:54,842 INFO L93 Difference]: Finished difference Result 542 states and 644 transitions. [2021-10-28 23:46:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-28 23:46:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-10-28 23:46:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:54,845 INFO L225 Difference]: With dead ends: 542 [2021-10-28 23:46:54,845 INFO L226 Difference]: Without dead ends: 542 [2021-10-28 23:46:54,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=765, Invalid=3791, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 23:46:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-10-28 23:46:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 275. [2021-10-28 23:46:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 256 states have (on average 1.26171875) internal successors, (323), 271 states have internal predecessors, (323), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 326 transitions. [2021-10-28 23:46:54,855 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 326 transitions. Word has length 47 [2021-10-28 23:46:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:54,855 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 326 transitions. [2021-10-28 23:46:54,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 326 transitions. [2021-10-28 23:46:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 23:46:54,856 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:54,856 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:54,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:46:55,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 23:46:55,057 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:55,057 INFO L85 PathProgramCache]: Analyzing trace with hash -131914094, now seen corresponding path program 2 times [2021-10-28 23:46:55,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:55,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688039172] [2021-10-28 23:46:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:55,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:55,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:55,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:55,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688039172] [2021-10-28 23:46:55,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688039172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:55,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867823675] [2021-10-28 23:46:55,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:46:55,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:55,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:46:55,389 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:46:55,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:46:56,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:46:56,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:46:56,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 23:46:56,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:46:56,226 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:46:56,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:46:56,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 23:46:56,403 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 23:46:56,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 17 [2021-10-28 23:46:56,457 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:46:56,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2021-10-28 23:46:56,511 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:46:56,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:46:56,567 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:46:56,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2021-10-28 23:46:56,804 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-10-28 23:46:56,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 59 [2021-10-28 23:46:57,048 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-28 23:46:57,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 25 [2021-10-28 23:46:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:57,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867823675] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:57,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:46:57,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-10-28 23:46:57,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420234992] [2021-10-28 23:46:57,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 23:46:57,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:46:57,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 23:46:57,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:46:57,056 INFO L87 Difference]: Start difference. First operand 275 states and 326 transitions. Second operand has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:46:58,515 INFO L93 Difference]: Finished difference Result 352 states and 411 transitions. [2021-10-28 23:46:58,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:46:58,515 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-10-28 23:46:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:46:58,517 INFO L225 Difference]: With dead ends: 352 [2021-10-28 23:46:58,517 INFO L226 Difference]: Without dead ends: 352 [2021-10-28 23:46:58,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 23:46:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-10-28 23:46:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 275. [2021-10-28 23:46:58,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 256 states have (on average 1.2578125) internal successors, (322), 271 states have internal predecessors, (322), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 325 transitions. [2021-10-28 23:46:58,525 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 325 transitions. Word has length 49 [2021-10-28 23:46:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:46:58,525 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 325 transitions. [2021-10-28 23:46:58,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:46:58,526 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 325 transitions. [2021-10-28 23:46:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 23:46:58,526 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:46:58,527 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:46:58,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:46:58,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 23:46:58,742 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:46:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:46:58,742 INFO L85 PathProgramCache]: Analyzing trace with hash -131914093, now seen corresponding path program 2 times [2021-10-28 23:46:58,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:46:58,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146827529] [2021-10-28 23:46:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:46:58,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:46:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:46:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:46:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:46:59,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:46:59,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146827529] [2021-10-28 23:46:59,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146827529] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:46:59,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768336524] [2021-10-28 23:46:59,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:46:59,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:46:59,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:46:59,110 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:46:59,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:46:59,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:46:59,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:46:59,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 23:46:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:47:00,031 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:47:00,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:47:00,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 23:47:00,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 23:47:00,393 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 23:47:00,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 57 [2021-10-28 23:47:00,405 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 23:47:00,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 32 [2021-10-28 23:47:00,561 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:00,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 47 [2021-10-28 23:47:00,571 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:00,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 38 [2021-10-28 23:47:00,645 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:47:00,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:47:00,761 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:00,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 64 [2021-10-28 23:47:00,772 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:00,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 45 [2021-10-28 23:47:01,350 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-10-28 23:47:01,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 94 [2021-10-28 23:47:01,362 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:01,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2021-10-28 23:47:01,656 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-28 23:47:01,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 43 [2021-10-28 23:47:01,664 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-28 23:47:01,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-10-28 23:47:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:01,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768336524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:01,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:47:01,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-10-28 23:47:01,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402887331] [2021-10-28 23:47:01,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 23:47:01,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:47:01,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 23:47:01,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:47:01,681 INFO L87 Difference]: Start difference. First operand 275 states and 325 transitions. Second operand has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:47:03,535 INFO L93 Difference]: Finished difference Result 366 states and 421 transitions. [2021-10-28 23:47:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:47:03,535 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-10-28 23:47:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:47:03,537 INFO L225 Difference]: With dead ends: 366 [2021-10-28 23:47:03,537 INFO L226 Difference]: Without dead ends: 366 [2021-10-28 23:47:03,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=334, Invalid=1922, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 23:47:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-10-28 23:47:03,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 272. [2021-10-28 23:47:03,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 253 states have (on average 1.2371541501976284) internal successors, (313), 268 states have internal predecessors, (313), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 316 transitions. [2021-10-28 23:47:03,544 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 316 transitions. Word has length 49 [2021-10-28 23:47:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:47:03,545 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 316 transitions. [2021-10-28 23:47:03,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 316 transitions. [2021-10-28 23:47:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 23:47:03,546 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:47:03,546 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:47:03,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:47:03,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 23:47:03,762 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:47:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:47:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash -421529196, now seen corresponding path program 1 times [2021-10-28 23:47:03,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:47:03,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617783769] [2021-10-28 23:47:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:03,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:47:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:04,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:47:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:04,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:47:04,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617783769] [2021-10-28 23:47:04,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617783769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:04,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056804797] [2021-10-28 23:47:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:04,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:04,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:47:04,128 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:47:04,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:47:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:05,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 23:47:05,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:47:05,307 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:47:05,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:47:05,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 23:47:05,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:47:05,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 23:47:05,555 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:05,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 63 [2021-10-28 23:47:05,565 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-28 23:47:05,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 40 [2021-10-28 23:47:06,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:47:06,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 49 [2021-10-28 23:47:06,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:47:06,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2021-10-28 23:47:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:47:06,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056804797] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:06,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:47:06,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-10-28 23:47:06,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230479042] [2021-10-28 23:47:06,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 23:47:06,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:47:06,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 23:47:06,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:47:06,170 INFO L87 Difference]: Start difference. First operand 272 states and 316 transitions. Second operand has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:47:07,533 INFO L93 Difference]: Finished difference Result 321 states and 363 transitions. [2021-10-28 23:47:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:47:07,534 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-28 23:47:07,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:47:07,535 INFO L225 Difference]: With dead ends: 321 [2021-10-28 23:47:07,535 INFO L226 Difference]: Without dead ends: 321 [2021-10-28 23:47:07,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=405, Invalid=1757, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 23:47:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-10-28 23:47:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 277. [2021-10-28 23:47:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 258 states have (on average 1.2325581395348837) internal successors, (318), 273 states have internal predecessors, (318), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 321 transitions. [2021-10-28 23:47:07,542 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 321 transitions. Word has length 50 [2021-10-28 23:47:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:47:07,543 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 321 transitions. [2021-10-28 23:47:07,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 321 transitions. [2021-10-28 23:47:07,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 23:47:07,544 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:47:07,544 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:47:07,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:47:07,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:07,770 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:47:07,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:47:07,770 INFO L85 PathProgramCache]: Analyzing trace with hash -438746489, now seen corresponding path program 2 times [2021-10-28 23:47:07,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:47:07,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522318243] [2021-10-28 23:47:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:07,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:47:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:08,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:47:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:08,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:47:08,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522318243] [2021-10-28 23:47:08,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522318243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:08,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669427971] [2021-10-28 23:47:08,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:47:08,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:08,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:47:08,062 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:47:08,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:47:08,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:47:08,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:47:08,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:47:08,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:47:09,077 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:47:09,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:47:09,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-28 23:47:09,341 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 23:47:09,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 27 [2021-10-28 23:47:09,460 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:09,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2021-10-28 23:47:09,512 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:47:09,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:47:09,587 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:09,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 40 [2021-10-28 23:47:09,853 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-10-28 23:47:09,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 64 [2021-10-28 23:47:10,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:47:10,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 30 [2021-10-28 23:47:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:10,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669427971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:10,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:47:10,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-10-28 23:47:10,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902262160] [2021-10-28 23:47:10,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 23:47:10,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:47:10,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 23:47:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:47:10,132 INFO L87 Difference]: Start difference. First operand 277 states and 321 transitions. Second operand has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:47:12,996 INFO L93 Difference]: Finished difference Result 487 states and 550 transitions. [2021-10-28 23:47:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 23:47:12,997 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-10-28 23:47:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:47:12,999 INFO L225 Difference]: With dead ends: 487 [2021-10-28 23:47:12,999 INFO L226 Difference]: Without dead ends: 485 [2021-10-28 23:47:13,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=932, Invalid=5874, Unknown=0, NotChecked=0, Total=6806 [2021-10-28 23:47:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-10-28 23:47:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 300. [2021-10-28 23:47:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 281 states have (on average 1.2597864768683273) internal successors, (354), 296 states have internal predecessors, (354), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 357 transitions. [2021-10-28 23:47:13,009 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 357 transitions. Word has length 52 [2021-10-28 23:47:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:47:13,009 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 357 transitions. [2021-10-28 23:47:13,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:13,011 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 357 transitions. [2021-10-28 23:47:13,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 23:47:13,012 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:47:13,012 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:47:13,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:47:13,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:13,234 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr41ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:47:13,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:47:13,234 INFO L85 PathProgramCache]: Analyzing trace with hash 708201269, now seen corresponding path program 1 times [2021-10-28 23:47:13,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:47:13,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16523945] [2021-10-28 23:47:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:13,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:47:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:13,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:47:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:13,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:47:13,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16523945] [2021-10-28 23:47:13,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16523945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:13,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107850247] [2021-10-28 23:47:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:13,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:13,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:47:13,450 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:47:13,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:47:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:14,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:47:14,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:47:14,618 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:47:14,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:47:14,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 23:47:14,862 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:14,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 37 [2021-10-28 23:47:15,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:47:15,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 29 [2021-10-28 23:47:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:47:15,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107850247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:15,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:47:15,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-10-28 23:47:15,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298904066] [2021-10-28 23:47:15,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:47:15,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:47:15,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:47:15,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:47:15,378 INFO L87 Difference]: Start difference. First operand 300 states and 357 transitions. Second operand has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:47:16,803 INFO L93 Difference]: Finished difference Result 353 states and 409 transitions. [2021-10-28 23:47:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 23:47:16,804 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-10-28 23:47:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:47:16,805 INFO L225 Difference]: With dead ends: 353 [2021-10-28 23:47:16,805 INFO L226 Difference]: Without dead ends: 353 [2021-10-28 23:47:16,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 23:47:16,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-10-28 23:47:16,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 298. [2021-10-28 23:47:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 279 states have (on average 1.2616487455197132) internal successors, (352), 294 states have internal predecessors, (352), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 355 transitions. [2021-10-28 23:47:16,812 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 355 transitions. Word has length 53 [2021-10-28 23:47:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:47:16,813 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 355 transitions. [2021-10-28 23:47:16,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 355 transitions. [2021-10-28 23:47:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:47:16,814 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:47:16,814 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:47:16,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:47:17,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-28 23:47:17,033 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:47:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:47:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash -562890213, now seen corresponding path program 2 times [2021-10-28 23:47:17,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:47:17,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269400418] [2021-10-28 23:47:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:17,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:47:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:17,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:47:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:17,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:47:17,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269400418] [2021-10-28 23:47:17,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269400418] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:17,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239666346] [2021-10-28 23:47:17,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:47:17,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:17,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:47:17,662 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:47:17,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:47:18,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:47:18,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:47:18,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 23:47:18,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:47:18,791 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 23:47:18,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 23:47:18,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:47:18,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 23:47:19,164 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 23:47:19,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2021-10-28 23:47:19,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 23:47:19,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:19,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 23:47:19,408 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 23:47:19,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-10-28 23:47:19,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:19,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-10-28 23:47:19,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:19,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-10-28 23:47:19,528 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 23:47:19,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 23:47:19,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-28 23:47:19,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:19,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:19,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:19,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-10-28 23:47:19,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-10-28 23:47:20,047 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-10-28 23:47:20,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 102 [2021-10-28 23:47:20,061 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-10-28 23:47:20,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 105 [2021-10-28 23:47:20,084 INFO L354 Elim1Store]: treesize reduction 128, result has 16.3 percent of original size [2021-10-28 23:47:20,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 98 [2021-10-28 23:47:20,544 INFO L354 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2021-10-28 23:47:20,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 67 [2021-10-28 23:47:20,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2021-10-28 23:47:20,830 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-10-28 23:47:20,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 33 [2021-10-28 23:47:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:20,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239666346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:20,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:47:20,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-10-28 23:47:20,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14408722] [2021-10-28 23:47:20,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 23:47:20,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:47:20,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 23:47:20,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1590, Unknown=2, NotChecked=0, Total=1806 [2021-10-28 23:47:20,862 INFO L87 Difference]: Start difference. First operand 298 states and 355 transitions. Second operand has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:47:22,712 INFO L93 Difference]: Finished difference Result 455 states and 532 transitions. [2021-10-28 23:47:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:47:22,713 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-10-28 23:47:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:47:22,715 INFO L225 Difference]: With dead ends: 455 [2021-10-28 23:47:22,715 INFO L226 Difference]: Without dead ends: 455 [2021-10-28 23:47:22,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=394, Invalid=2684, Unknown=2, NotChecked=0, Total=3080 [2021-10-28 23:47:22,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-10-28 23:47:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 336. [2021-10-28 23:47:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 317 states have (on average 1.249211356466877) internal successors, (396), 332 states have internal predecessors, (396), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 399 transitions. [2021-10-28 23:47:22,726 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 399 transitions. Word has length 55 [2021-10-28 23:47:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:47:22,726 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 399 transitions. [2021-10-28 23:47:22,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 399 transitions. [2021-10-28 23:47:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:47:22,727 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:47:22,728 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:47:22,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:47:22,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:22,941 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:47:22,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:47:22,942 INFO L85 PathProgramCache]: Analyzing trace with hash -563198043, now seen corresponding path program 1 times [2021-10-28 23:47:22,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:47:22,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103081238] [2021-10-28 23:47:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:22,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:47:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:23,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:47:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:23,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:47:23,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103081238] [2021-10-28 23:47:23,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103081238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:23,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274307652] [2021-10-28 23:47:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:23,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:23,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:47:23,436 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:47:23,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:47:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:24,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 23:47:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:47:24,945 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 23:47:24,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 23:47:25,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:47:25,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 23:47:25,249 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 23:47:25,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 23:47:25,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:25,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2021-10-28 23:47:25,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:47:25,408 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 23:47:25,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-10-28 23:47:25,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:25,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-10-28 23:47:25,490 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 23:47:25,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 23:47:25,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-28 23:47:25,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:25,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 23:47:25,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:25,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 23:47:25,914 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-10-28 23:47:25,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 223 treesize of output 97 [2021-10-28 23:47:25,927 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-10-28 23:47:25,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 122 [2021-10-28 23:47:25,939 INFO L354 Elim1Store]: treesize reduction 77, result has 16.3 percent of original size [2021-10-28 23:47:25,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 94 [2021-10-28 23:47:26,224 INFO L354 Elim1Store]: treesize reduction 14, result has 22.2 percent of original size [2021-10-28 23:47:26,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 58 [2021-10-28 23:47:26,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-10-28 23:47:26,404 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 23:47:26,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2021-10-28 23:47:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:26,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274307652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:26,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:47:26,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2021-10-28 23:47:26,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579388127] [2021-10-28 23:47:26,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 23:47:26,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:47:26,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 23:47:26,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:47:26,412 INFO L87 Difference]: Start difference. First operand 336 states and 399 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:47:28,145 INFO L93 Difference]: Finished difference Result 483 states and 560 transitions. [2021-10-28 23:47:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 23:47:28,146 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-10-28 23:47:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:47:28,148 INFO L225 Difference]: With dead ends: 483 [2021-10-28 23:47:28,148 INFO L226 Difference]: Without dead ends: 483 [2021-10-28 23:47:28,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=403, Invalid=2459, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 23:47:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-10-28 23:47:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 336. [2021-10-28 23:47:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 317 states have (on average 1.249211356466877) internal successors, (396), 332 states have internal predecessors, (396), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 399 transitions. [2021-10-28 23:47:28,157 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 399 transitions. Word has length 55 [2021-10-28 23:47:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:47:28,157 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 399 transitions. [2021-10-28 23:47:28,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 399 transitions. [2021-10-28 23:47:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:47:28,158 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:47:28,159 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:47:28,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:47:28,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:28,378 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:47:28,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:47:28,378 INFO L85 PathProgramCache]: Analyzing trace with hash 105311611, now seen corresponding path program 1 times [2021-10-28 23:47:28,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:47:28,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904268168] [2021-10-28 23:47:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:28,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:47:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:28,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:47:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:28,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:47:28,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904268168] [2021-10-28 23:47:28,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904268168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:28,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987342265] [2021-10-28 23:47:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:28,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:28,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:47:28,921 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:47:28,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:47:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:30,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-28 23:47:30,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:47:30,465 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 23:47:30,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 23:47:30,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 23:47:30,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:47:30,768 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 23:47:30,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2021-10-28 23:47:30,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:30,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 23:47:30,891 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 23:47:30,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2021-10-28 23:47:30,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:47:30,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2021-10-28 23:47:30,989 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 23:47:30,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 23:47:31,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 23:47:31,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:31,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 23:47:31,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-28 23:47:31,402 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-28 23:47:31,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 303 treesize of output 156 [2021-10-28 23:47:31,420 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-10-28 23:47:31,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 218 treesize of output 141 [2021-10-28 23:47:31,432 INFO L354 Elim1Store]: treesize reduction 77, result has 16.3 percent of original size [2021-10-28 23:47:31,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 104 [2021-10-28 23:47:31,706 INFO L354 Elim1Store]: treesize reduction 14, result has 22.2 percent of original size [2021-10-28 23:47:31,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 60 [2021-10-28 23:47:31,712 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 23:47:31,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 37 [2021-10-28 23:47:31,858 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:47:31,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-28 23:47:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:31,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987342265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:31,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:47:31,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2021-10-28 23:47:31,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875744667] [2021-10-28 23:47:31,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 23:47:31,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:47:31,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 23:47:31,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:47:31,868 INFO L87 Difference]: Start difference. First operand 336 states and 399 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:47:33,618 INFO L93 Difference]: Finished difference Result 485 states and 560 transitions. [2021-10-28 23:47:33,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 23:47:33,619 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-10-28 23:47:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:47:33,621 INFO L225 Difference]: With dead ends: 485 [2021-10-28 23:47:33,621 INFO L226 Difference]: Without dead ends: 485 [2021-10-28 23:47:33,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=403, Invalid=2459, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 23:47:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-10-28 23:47:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 338. [2021-10-28 23:47:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 319 states have (on average 1.2476489028213167) internal successors, (398), 334 states have internal predecessors, (398), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 401 transitions. [2021-10-28 23:47:33,627 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 401 transitions. Word has length 55 [2021-10-28 23:47:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:47:33,627 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 401 transitions. [2021-10-28 23:47:33,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 401 transitions. [2021-10-28 23:47:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:47:33,628 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:47:33,629 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:47:33,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:47:33,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 23:47:33,850 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:47:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:47:33,850 INFO L85 PathProgramCache]: Analyzing trace with hash 105003781, now seen corresponding path program 1 times [2021-10-28 23:47:33,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:47:33,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055621981] [2021-10-28 23:47:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:33,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:47:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:34,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:47:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:34,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:47:34,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055621981] [2021-10-28 23:47:34,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055621981] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:34,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096741966] [2021-10-28 23:47:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:34,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:34,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:47:34,434 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:47:34,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:47:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:35,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 23:47:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:47:35,802 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 23:47:35,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 23:47:35,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:47:35,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 23:47:36,162 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 23:47:36,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2021-10-28 23:47:36,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 23:47:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:36,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 23:47:36,393 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 23:47:36,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2021-10-28 23:47:36,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2021-10-28 23:47:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:36,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 23:47:36,488 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 23:47:36,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 23:47:36,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:47:36,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-28 23:47:36,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-28 23:47:36,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-10-28 23:47:36,931 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-10-28 23:47:36,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 110 [2021-10-28 23:47:36,950 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-10-28 23:47:36,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 135 [2021-10-28 23:47:36,969 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-10-28 23:47:36,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 114 [2021-10-28 23:47:37,300 INFO L354 Elim1Store]: treesize reduction 14, result has 22.2 percent of original size [2021-10-28 23:47:37,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 71 [2021-10-28 23:47:37,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2021-10-28 23:47:37,468 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-28 23:47:37,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 23 [2021-10-28 23:47:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:37,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096741966] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:37,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:47:37,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-10-28 23:47:37,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581119393] [2021-10-28 23:47:37,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 23:47:37,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:47:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 23:47:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 23:47:37,493 INFO L87 Difference]: Start difference. First operand 338 states and 401 transitions. Second operand has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:39,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:47:39,409 INFO L93 Difference]: Finished difference Result 451 states and 525 transitions. [2021-10-28 23:47:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:47:39,410 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-10-28 23:47:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:47:39,412 INFO L225 Difference]: With dead ends: 451 [2021-10-28 23:47:39,412 INFO L226 Difference]: Without dead ends: 451 [2021-10-28 23:47:39,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 23:47:39,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-28 23:47:39,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 336. [2021-10-28 23:47:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 317 states have (on average 1.2429022082018928) internal successors, (394), 332 states have internal predecessors, (394), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:39,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 397 transitions. [2021-10-28 23:47:39,419 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 397 transitions. Word has length 55 [2021-10-28 23:47:39,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:47:39,419 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 397 transitions. [2021-10-28 23:47:39,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:39,419 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 397 transitions. [2021-10-28 23:47:39,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:47:39,420 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:47:39,420 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:47:39,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:47:39,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 23:47:39,638 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:47:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:47:39,638 INFO L85 PathProgramCache]: Analyzing trace with hash -566843399, now seen corresponding path program 1 times [2021-10-28 23:47:39,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:47:39,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217346981] [2021-10-28 23:47:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:39,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:47:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:39,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:47:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:47:39,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:47:39,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217346981] [2021-10-28 23:47:39,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217346981] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:39,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071133546] [2021-10-28 23:47:39,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:39,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:39,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:47:39,967 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:47:39,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 23:47:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:41,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 23:47:41,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:47:41,665 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:47:41,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:47:41,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 23:47:41,874 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 23:47:41,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 23 [2021-10-28 23:47:41,964 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:41,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-10-28 23:47:42,018 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:47:42,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:47:42,106 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:42,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 36 [2021-10-28 23:47:42,358 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-10-28 23:47:42,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 65 [2021-10-28 23:47:42,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:47:42,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2021-10-28 23:47:42,797 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 23:47:42,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 23:47:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:42,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071133546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:42,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:47:42,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 35 [2021-10-28 23:47:42,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023027607] [2021-10-28 23:47:42,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 23:47:42,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:47:42,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 23:47:42,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:47:42,837 INFO L87 Difference]: Start difference. First operand 336 states and 397 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:47:46,934 INFO L93 Difference]: Finished difference Result 539 states and 614 transitions. [2021-10-28 23:47:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-28 23:47:46,934 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-10-28 23:47:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:47:46,937 INFO L225 Difference]: With dead ends: 539 [2021-10-28 23:47:46,937 INFO L226 Difference]: Without dead ends: 539 [2021-10-28 23:47:46,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1083, Invalid=6927, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 23:47:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-10-28 23:47:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 366. [2021-10-28 23:47:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 347 states have (on average 1.2593659942363113) internal successors, (437), 362 states have internal predecessors, (437), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 440 transitions. [2021-10-28 23:47:46,945 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 440 transitions. Word has length 55 [2021-10-28 23:47:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:47:46,946 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 440 transitions. [2021-10-28 23:47:46,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 440 transitions. [2021-10-28 23:47:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 23:47:46,947 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:47:46,947 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:47:46,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:47:47,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 23:47:47,182 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:47:47,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:47:47,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1144862377, now seen corresponding path program 1 times [2021-10-28 23:47:47,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:47:47,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243747777] [2021-10-28 23:47:47,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:47,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:47:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:47,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:47:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:47:47,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:47:47,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243747777] [2021-10-28 23:47:47,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243747777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:47,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371721287] [2021-10-28 23:47:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:47,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:47:47,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:47:47,526 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:47:47,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 23:47:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:47:48,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:47:48,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:47:49,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-10-28 23:47:49,410 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 23:47:49,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 47 [2021-10-28 23:47:49,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:47:49,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2021-10-28 23:47:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:47:50,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371721287] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:47:50,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:47:50,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-10-28 23:47:50,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589687470] [2021-10-28 23:47:50,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 23:47:50,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:47:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 23:47:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:47:50,168 INFO L87 Difference]: Start difference. First operand 366 states and 440 transitions. Second operand has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:47:51,660 INFO L93 Difference]: Finished difference Result 391 states and 465 transitions. [2021-10-28 23:47:51,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:47:51,660 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-10-28 23:47:51,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:47:51,662 INFO L225 Difference]: With dead ends: 391 [2021-10-28 23:47:51,662 INFO L226 Difference]: Without dead ends: 386 [2021-10-28 23:47:51,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 23:47:51,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-10-28 23:47:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 362. [2021-10-28 23:47:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 343 states have (on average 1.2594752186588922) internal successors, (432), 358 states have internal predecessors, (432), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 435 transitions. [2021-10-28 23:47:51,670 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 435 transitions. Word has length 56 [2021-10-28 23:47:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:47:51,670 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 435 transitions. [2021-10-28 23:47:51,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:47:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 435 transitions. [2021-10-28 23:47:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 23:47:51,672 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:47:51,672 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:47:51,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 23:47:51,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 23:47:51,886 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 23:47:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:47:51,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1802178581, now seen corresponding path program 1 times [2021-10-28 23:47:51,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:47:51,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968763746] [2021-10-28 23:47:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:47:51,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:47:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:47:51,925 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:47:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:47:51,993 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:47:51,993 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:47:51,994 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr33REQUIRES_VIOLATION [2021-10-28 23:47:51,995 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 23:47:51,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 23:47:51,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 23:47:51,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 23:47:51,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 23:47:51,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 23:47:51,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 23:47:51,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 23:47:51,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 23:47:51,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 23:47:51,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 23:47:51,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 23:47:51,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 23:47:51,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 23:47:51,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 23:47:51,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 23:47:51,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 23:47:51,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-28 23:47:51,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 23:47:51,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 23:47:52,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-28 23:47:52,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 23:47:52,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-28 23:47:52,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-28 23:47:52,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-28 23:47:52,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-28 23:47:52,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-28 23:47:52,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-28 23:47:52,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-28 23:47:52,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-28 23:47:52,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:47:52,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:47:52,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:47:52,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-28 23:47:52,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-28 23:47:52,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-10-28 23:47:52,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:47:52,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:47:52,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:47:52,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:47:52,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:47:52,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:47:52,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 23:47:52,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:47:52,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-10-28 23:47:52,009 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:47:52,013 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:47:52,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:47:52 BoogieIcfgContainer [2021-10-28 23:47:52,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:47:52,087 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:47:52,087 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:47:52,087 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:47:52,088 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:45:46" (3/4) ... [2021-10-28 23:47:52,090 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:47:52,168 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:47:52,168 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:47:52,169 INFO L168 Benchmark]: Toolchain (without parser) took 127309.62 ms. Allocated memory was 104.9 MB in the beginning and 604.0 MB in the end (delta: 499.1 MB). Free memory was 64.2 MB in the beginning and 180.7 MB in the end (delta: -116.5 MB). Peak memory consumption was 382.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:47:52,170 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory was 81.6 MB in the beginning and 81.5 MB in the end (delta: 60.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:47:52,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 551.78 ms. Allocated memory is still 104.9 MB. Free memory was 63.9 MB in the beginning and 73.0 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:47:52,170 INFO L168 Benchmark]: Boogie Preprocessor took 63.31 ms. Allocated memory is still 104.9 MB. Free memory was 73.0 MB in the beginning and 70.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:47:52,171 INFO L168 Benchmark]: RCFGBuilder took 689.64 ms. Allocated memory is still 104.9 MB. Free memory was 70.2 MB in the beginning and 45.5 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:47:52,171 INFO L168 Benchmark]: TraceAbstraction took 125910.92 ms. Allocated memory was 104.9 MB in the beginning and 604.0 MB in the end (delta: 499.1 MB). Free memory was 45.2 MB in the beginning and 183.8 MB in the end (delta: -138.6 MB). Peak memory consumption was 363.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:47:52,171 INFO L168 Benchmark]: Witness Printer took 81.49 ms. Allocated memory is still 604.0 MB. Free memory was 183.8 MB in the beginning and 180.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:47:52,173 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory was 81.6 MB in the beginning and 81.5 MB in the end (delta: 60.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 551.78 ms. Allocated memory is still 104.9 MB. Free memory was 63.9 MB in the beginning and 73.0 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.31 ms. Allocated memory is still 104.9 MB. Free memory was 73.0 MB in the beginning and 70.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 689.64 ms. Allocated memory is still 104.9 MB. Free memory was 70.2 MB in the beginning and 45.5 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 125910.92 ms. Allocated memory was 104.9 MB in the beginning and 604.0 MB in the end (delta: 499.1 MB). Free memory was 45.2 MB in the beginning and 183.8 MB in the end (delta: -138.6 MB). Peak memory consumption was 363.5 MB. Max. memory is 16.1 GB. * Witness Printer took 81.49 ms. Allocated memory is still 604.0 MB. Free memory was 183.8 MB in the beginning and 180.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 610]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L567] List p, a, t; [L568] a = (List) malloc(sizeof(struct node)) [L569] COND FALSE !(a == 0) VAL [a={1:0}] [L570] a->n = 0 VAL [a={1:0}] [L571] p = a [L572] int i = 0; VAL [a={1:0}, i=0, p={1:0}] [L573] i < 20 && __VERIFIER_nondet_int() [L573] i < 20 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=0, i < 20 && __VERIFIER_nondet_int()=1, p={1:0}] [L573] COND TRUE i < 20 && __VERIFIER_nondet_int() [L574] i++ [L575] p->flag = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, a={1:0}, i=1, p={1:0}] [L576] p->flag VAL [a={1:0}, i=1, p={1:0}, p->flag=-1] [L576] COND TRUE p->flag [L577] p->h = 1 VAL [a={1:0}, i=1, p={1:0}] [L581] t = (List) malloc(sizeof(struct node)) [L582] COND FALSE !(t == 0) VAL [a={1:0}, i=1, p={1:0}, t={-2:0}] [L583] p->n = t VAL [a={1:0}, i=1, p={1:0}, t={-2:0}] [L584] EXPR p->n VAL [a={1:0}, i=1, p={1:0}, p->n={-2:0}, t={-2:0}] [L584] p = p->n [L573] i < 20 && __VERIFIER_nondet_int() [L573] i < 20 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={1:0}, i=1, i < 20 && __VERIFIER_nondet_int()=0, p={-2:0}, t={-2:0}] [L573] COND FALSE !(i < 20 && __VERIFIER_nondet_int()) [L586] p->h = 3 VAL [a={1:0}, i=1, p={-2:0}, t={-2:0}] [L587] p = a VAL [a={1:0}, i=1, p={1:0}, t={-2:0}] [L588] EXPR p->h VAL [a={1:0}, i=1, p={1:0}, p->h=1, t={-2:0}] [L588] COND TRUE p->h != 3 [L589] p->flag VAL [a={1:0}, i=1, p={1:0}, p->flag=-1, t={-2:0}] [L589] COND TRUE p->flag [L590] EXPR p->h VAL [a={1:0}, i=1, p={1:0}, p->h=1, t={-2:0}] [L590] COND FALSE !(p->h != 1) [L596] EXPR p->n VAL [a={1:0}, i=1, p={1:0}, p->n={-2:0}, t={-2:0}] [L596] p = p->n [L597] i++ VAL [a={1:0}, i=2, p={-2:0}, t={-2:0}] [L588] EXPR p->h VAL [a={1:0}, i=2, p={-2:0}, p->h=3, t={-2:0}] [L588] COND FALSE !(p->h != 3) [L599] EXPR p->h VAL [a={1:0}, i=2, p={-2:0}, p->h=3, t={-2:0}] [L599] COND FALSE !(p->h != 3 || i > 20) [L601] p = a VAL [a={1:0}, i=2, p={1:0}, t={-2:0}] [L602] COND FALSE !(p == 0) VAL [a={1:0}, i=2, p={1:0}, t={-2:0}] [L605] EXPR p->n VAL [a={1:0}, i=2, p={1:0}, p->n={-2:0}, t={-2:0}] [L605] COND FALSE !(p->n == 0) [L610] EXPR p->n VAL [a={1:0}, i=2, p={1:0}, p->n={-2:0}, t={-2:0}] [L610] COND TRUE p->n != 0 [L611] EXPR p->n VAL [a={1:0}, i=2, p={1:0}, p->n={-2:0}, t={-2:0}] [L611] t = p->n [L612] free(p) VAL [a={1:0}, i=2, p={1:0}, t={-2:0}] [L612] free(p) VAL [a={1:0}, i=2, p={1:0}, t={-2:0}] [L612] free(p) [L613] p = t VAL [a={1:0}, i=2, p={-2:0}, t={-2:0}] [L610] EXPR p->n VAL [a={1:0}, i=2, p={-2:0}, p->n={58:60}, t={-2:0}] [L610] COND TRUE p->n != 0 [L611] EXPR p->n VAL [a={1:0}, i=2, p={-2:0}, p->n={58:60}, t={-2:0}] [L611] t = p->n [L612] free(p) VAL [a={1:0}, i=2, p={-2:0}, t={58:60}] [L612] free(p) VAL [a={1:0}, i=2, p={-2:0}, t={58:60}] [L612] free(p) [L613] p = t VAL [a={1:0}, i=2, p={58:60}, t={58:60}] [L610] p->n - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 583]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 583]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 599]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 599]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 611]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 611]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 615]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 615]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 615]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 119 locations, 45 error locations. Started 1 CEGAR loops. OverallTime: 125.7s, OverallIterations: 39, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 65.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2731 SDtfs, 14574 SDslu, 22807 SDs, 0 SdLazy, 37664 SolverSat, 2704 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 44.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2140 GetRequests, 885 SyntacticMatches, 33 SemanticMatches, 1222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16546 ImplicationChecksByTransitivity, 27.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=366occurred in iteration=37, InterpolantAutomatonStates: 775, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 38 MinimizatonAttempts, 3369 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 35.7s InterpolantComputationTime, 2598 NumberOfCodeBlocks, 2598 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2478 ConstructedInterpolants, 321 QuantifiedInterpolants, 43696 SizeOfPredicates, 336 NumberOfNonLiveVariables, 6024 ConjunctsInSsa, 897 ConjunctsInUnsatCore, 63 InterpolantComputations, 13 PerfectInterpolantSequences, 34/591 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:47:52,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6239422-59f9-4b2d-bd28-14d8b3f8b05e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...